One vertex per element, one color per generator, with an edge from x to x·s.
(2,4)(5,6)(7,15)(8,12)(9,13)(10,14)(11,17)(16,20)(18,19)(22,26)(23,30)(27,29)(31,36) involution — undirected(5,7)(6,11)(8,16)(9,18)(10,17)(12,19)(13,20)(14,15)(21,22,24,26)(23,28,30,33)(25,27,32,29)(31,34,36,35)(1,2,3,4)(5,8,10,9)(6,12,14,13)(7,16,17,18)(11,19,15,20)(22,27)(25,32)(26,29)(28,34)(31,36)(33,35)(5,8,10,9)(6,13,14,12)(7,16,17,18)(11,20,15,19)(21,23,24,30)(22,28,26,33)(25,31,32,36)(27,34,29,35)(5,9,10,8)(6,13,14,12)(7,16,17,18)(11,19,15,20)(22,27)(25,32)(26,29)(28,34)(31,36)(33,35)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.